var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var cors = require('cors')
var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var suntRouter = require('./routes/sunt');

var JWT = require('./util/JWT')
const businessRouter = require('./routes/bussiness');

const foodRouter = require('./routes/food');

var app = express();
app.use(cors())
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use((req, res, next) => {
  // 如果token有效通过，next()
  // 如果token过期了，返回401
  console.log(req.url)
  if (req.url === '/users/login') {
    next()
    return
  }
  const token = req.headers["authorization"].split(" ")[1]
  if (token) {
    var payload = JWT.verify(token)
    if (payload) {
      const newToken = JWT.generate({
        _id: payload._id,
        name: payload.name
      }, '1d')
      res.setHeader('Access-Control-Expose-Headers', 'Authorization')
      res.header("Authorization", newToken)
      next()
    } else {
      res.status(401).send({ errCode: "-1", errInfo: "token过期" })
    }
  }
})

app.use('/', indexRouter);
app.use('/users', usersRouter);
app.use('/business', businessRouter)
app.use('/food', foodRouter)
app.use('/sunt', suntRouter)
// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404));
});

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
